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EnglishStarting and operating -> Fuel for your Subaru Forester 2019-2024
Fuel 303
SUBARU dealer for service. If it is deter-
mined that the condition is caused by the
type of fuel used, repairs may not be
covered by your warranty.
! RON
7-1. Fuel
This octane rating is the Research Octane
Number.
CAUTION
! AKI
! Gasoline for cleaner air
.
.
Use of a fuel which is low in
quality or use of an inappropriate
fuel additive may cause damage
to the engine and/or fuel system.
This octane rating is the average of the
Research Octane and Motor Octane num-
bers and is commonly referred to as the
Anti Knock Index (AKI).
Your use of gasoline with detergent ad-
ditives will help prevent deposits from
forming in your engine and fuel system.
This helps keep your engine in tune and
your emission control system working
properly, and is a way of doing your part
for cleaner air. If you continuously use a
high-quality fuel with the proper detergent
and other additives, you should never
need to add any fuel system cleaning
agents to your fuel tank.
Some gas stations, particularly
those in high altitude areas, offer
fuels posted as regular octane
gasoline with an octane rating
below 87 AKI (90 RON). Use of
those fuels is not recommended.
! Unleaded gasoline
The neck of the fuel filler pipe is designed
to accept only an unleaded gasoline filler
nozzle. Under no circumstances should
leaded gasoline be used because it will
damage the emission control system and
may impair driveability and fuel economy.
& Fuel requirements
The engine is designed to operate using
unleaded gasoline with an octane rating
of 87 AKI (90 RON) or higher.
Many gasolines are now blended with
materials called oxygenates. Use of these
fuels can also help keep the air cleaner.
Oxygenated blend fuels, such as ethanol
(ethyl or grain alcohol) may be used in your
vehicle, but should contain no more than
15% ethanol for the proper operation of
your SUBARU.
! Reformulated gasoline
SUBARU supports the use of reformulated
gasoline when available. Reformulated
gasoline has been blended to burn more
cleanly and reduce vehicle emissions.
! Fuel octane rating
! MMT
Using a gasoline with a lower octane rating
can cause persistent and heavy knocking,
which can damage the engine. Do not be
concerned if your vehicle sometimes
knocks lightly when you drive up a hill or
when you accelerate. Contact your
SUBARU dealer if you use a fuel with the
specified octane rating and your vehicle
knocks heavily or persistently.
Some gasoline contains an octane-enhan-
cing additive called MMT (Methylcyclo-
pentadienyl Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate and
the CHECK ENGINE warning light/Mal-
function indicator light may turn on. If this
happens, return to your authorized
Do not use any gasoline that contains
more than 15% ethanol, including from any
pump labeled, E30, E50 or E85 (which are
only some examples of fuel containing
more than 15% ethanol).
In addition, some gasoline suppliers are
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Fuel
304
now producing reformulated gasolines,
which are designed to reduce vehicle
emissions. SUBARU approves the use of
reformulated gasoline.
SUBARU dealer.
! Refueling
.
Fuel system damage or driveability
problems which result from the use of
improper fuel are not covered under the
SUBARU Limited Warranty.
Only one person should be involved in
refueling. Do not allow others to approach
the area of the vehicle near the fuel filler
pipe while refueling is in progress.
Be sure to observe any other precautions
that are posted at the service station.
If you are not sure what the fuel contains,
you should ask your service station op-
erators if their gasolines contain deter-
gents and oxygenates and if they have
been reformulated to reduce vehicle emis-
sions.
CAUTION
Do not let fuel spill on the exterior
surfaces of the vehicle. Because fuel
may damage the paint, be sure to
wipe off any spilled fuel quickly.
Paint damage caused by spilled fuel
is not covered under the SUBARU
Limited Warranty.
1. Before refueling, stop the vehicle, then
turn off the ignition switch to turn off all
the electrical components. At this time,
the fuel filler lid also unlocks.
As additional guidance, only use fuels
suited for your vehicle as explained in the
following description.
NOTE
When you lock the door, the fuel filler
lid also locks. To unlock the fuel filler
lid, perform one of the operations
below.
.
Fuel should be unleaded and have an
octane rating no lower than that speci-
fied in this manual.
& Fuel filler lid and cap
.
Methanol (methyl or wood alcohol) is
sometimes mixed with unleaded gaso-
line. Methanol can be used in your
vehicle ONLY if it does not exceed 5%
of the fuel mixture AND if it is accom-
panied by sufficient quantities of the
proper cosolvents and corrosion inhibi-
tors required to prevent damage to the
fuel system. Do not use fuel containing
methanol EXCEPT under these condi-
tions.
– Press the unlock button on the
key fob.
– Press the unlock side of the
power door locking switch.
! Locations of the fuel filler lid
2. Push the rear side of the fuel filler lid.
3. The fuel filler lid opens automatically.
Open it further by hand.
WARNING
.
If undesirable driveability problems are
experienced and you suspect they may
be fuel related, try a different brand of
gasoline before seeking service at your
Before opening the fuel filler cap,
first touch the vehicle body or a
metal portion of the fuel pump or
similar object to discharge any sta-
Fuel 305
tic electricity that may be present on
your body. If your body is carrying
an electrostatic charge, there is a
possibility that an electric spark
could ignite the fuel, which could
burn you. To avoid acquiring a new
static electric charge, do not get
back into the vehicle while refueling
is in progress.
WARNING
.
Gasoline vapor is highly flam-
mable. Before refueling, always
turn the ignition switch to the
“LOCK”/“OFF” position first and
then close all vehicle doors and
windows. Make sure that there
are no lighted cigarettes, open
flames or electrical sparks in the
adjacent area. Only handle fuel
outdoors. Quickly wipe up any
spilled fuel.
5. Set the fuel filler cap on the cap holder
inside the fuel filler lid.
.
When opening the cap, grasp it
firmly and turn it slowly to the left.
Do not remove the cap quickly.
Fuel may be under pressure and
spray out of the fuel filler neck,
especially in hot weather. If you
hear a hissing sound while you
are removing the cap, wait for the
sound to stop and then slowly
open the cap to prevent fuel from
spraying out and creating a fire
hazard.
WARNING
.
When refueling, insert the fuel
nozzle securely into the fuel filler
pipe. If the nozzle is lifted or not
fully inserted, its automatic stop-
ping mechanism may not func-
tion, causing fuel to overflow the
tank and creating a fire hazard.
1
2
Open
Close
4. Remove the fuel filler cap by turning it
slowly counterclockwise.
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Fuel
306
.
Stop refueling when the auto-
matic stop mechanism on the
fuel nozzle activates. If you con-
tinue to add fuel, temperature
changes or other conditions
may cause fuel to overflow from
the tank and create a fire hazard.
mage to the fuel system.
NOTE
.
After refueling, turn the cap to the
right until it clicks to ensure that
it is fully tightened. If the cap is
not securely tightened, fuel may
leak out while the vehicle is being
driven or fuel spillage could oc-
cur in the event of an accident,
creating a fire hazard.
.
You will see the “
” sign in the fuel
gauge. This indicates that the fuel
filler door (lid) is located on the right
side of the vehicle.
.
If the fuel filler cap is not tightened
until it clicks or if the tether is caught
under the cap, the CHECK ENGINE
warning light/malfunction indicator
light may illuminate. Refer to
“CHECK ENGINE warning light/Mal-
function indicator light” �P172.
To lock the fuel filler lid, perform one
of the operations below. However if
these operations are performed
when the fuel filler lid is open, the
fuel filler lid will not lock when it is
subsequently closed.
6. Stop filling the tank after the fuel filler
pump automatically stops. Do not add
any more fuel.
7. Put the cap back on and turn it clock-
wise until you hear a clicking noise. Be
certain not to catch the tether under the
cap while tightening.
.
.
.
Do not let fuel spill on the exterior
surfaces of the vehicle. Because
fuel may damage the paint, be
sure to wipe off any spilled fuel
quickly. Paint damage caused by
spilled fuel is not covered under
the SUBARU Limited Warranty.
.
CAUTION
Always use a genuine SUBARU
fuel filler cap. If you use the
wrong cap, it may not fit or have
proper venting and your fuel tank
and emission control system
may be damaged. It could also
lead to fuel spillage and a fire.
Make sure that the cap is tightened
until it clicks to prevent fuel spillage
in the event of an accident.
– Press the lock/arm button on the
key fob.
– Press the lock side of the power
door locking switch.
8. Close the fuel filler lid completely.
.
When the doors are locked or un-
locked using the automatic door
lock system, the fuel filler lid will be
locked or unlocked at the same time.
CAUTION
Immediately put fuel in the tank
whenever the low fuel warning
light illuminates. Engine misfires
as a result of an empty tank could
cause damage to the engine.
Continuing to operate your vehi-
cle at an extremely low fuel level
may result in a reduction of
If you spill any fuel on the painted
surface, rinse it off immediately.
Otherwise, the painted surface
could be damaged.
CAUTION
.
Never add any cleaning agents to
the fuel tank. The addition of a
cleaning agent may cause da-
State emission testing (U.S. only) 307
engine performance.
7-2. State emission testing
(U.S. only)
! If the fuel filler lid cannot be opened
If the fuel filler lid cannot be opened due to
malfunction or a dead battery, it can be
opened from the cargo area.
WARNING
Only use a four-wheel dynamometer
when testing an All-Wheel Drive
model.
Testing of an AWD model must
NEVER be performed on a single
two-wheel dynamometer. Attempt-
ing to do so will result in uncon-
trolled vehicle movement and may
cause an accident or injuries to
persons nearby.
1
Clip
2. Remove the orange knob from the clip.
CAUTION
1. Remove the access cover at the right-
side of the cargo area trim using flat-
head screwdriver.
.
.
At state inspection time, remem-
ber to tell your inspection or
service station in advance not to
place your SUBARU AWD vehicle
on a two-wheel dynamometer.
Otherwise, serious transmission
damage will result.
Resultant vehicle damage due to
improper testing is not covered
under the SUBARU Limited War-
ranty and is the responsibility of
the state inspection program or
3. Pull the orange knob to unlock the fuel
filler lid.
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